纳米Zn_2SnO_4的水热合成及电化学性能

Hydrothermal Synthesis and Electrochemical Properties of Nanoparticles Zn_2SnO_4

以SnCl4·5H2O,ZnCl2和N2H4·H2O为原料,用水热法制备Zn2SnO4纳米粉体.利用XRD,TEM和循环伏安等测试手段研究Zn2SnO4材料的结构、形貌及电化学性能.结果表明,当原料配比n(Zn)∶n(Sn)∶n(N2H4.H2O)=2∶1∶8时,180℃下水热合成24 h,得到晶型发育良好的纯相Zn2SnO4纳米材料.其首次放电和充电容量分别为1 634和709.7 mA.h/g,循环30次之后放电容量为483.7 mA.h/g,表现出较好的电化学性能.

The powdered Zn2SnO4 with nanoparticles were hydrothermally synthesized with SnCl4·5H2O,ZnCl2 and N2H4·H2O as starting materials.The crystal structure,morphology and electrochemical properties of the powdered Zn2SnO4 were investigated by XRD,TEM and galvanostatic charge-discharge test.The results showed that when the molar ratio ZnCl2∶SnCl4∶N2H4·H2O=2∶1∶8 and hydrothermal synthesis was done at 180 ℃ for 24 h,the pure powdered Zn2SnO4 present the well-growing crystal form and good electrochemical properties.The initial discharging and charging capacity of powdered Zn2SnO4 are 1 634 mA·h/g and 709.7 mA·h/g,respectively,and its discharging capacity after 30 cycles is 483.7 mA·h/g.